The University of Southern California is reportedly making a change at defensive coordinator.
According to Ross Dellenger of Yahoo! Sports, Trojans head coach Lincoln Riley announced Sunday that Grinch was fired.
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Defensive line coach Shaun Tua and inside linebackers coach Brian Odom will serve as interim co-defensive coordinators, according to Dellenger.
USC is coming off of its third loss in its past four games. The Trojans allowed 52 points to No. 5 Washington as the Huskies claimed a 52-42 shootout victory.
Grinch had been with USC since the 2019 season. The Trojans currently allow 34.5 points and 345 yards per game.
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USC has given up at least 34 points in its past six games. Opponents have scored 40 points against the Trojans in four games this season.